I'd say you are being a bit U. Women generally are advised to eat less calories than men so unless you are a body builder, you should be having a smaller bit of steak.I've seen it a few times and it has never occurred to me to think it sexist.

Too much red meat can increase your risk of breast cancer but other than that it seems ridiculous to label it as a 'lady steak'. I have a friend who always manages a whole chicken when she goes to Nandos and she's dinky.

I'm in two minds really. On one hand its patronising and sexist. But on the other hand like many women, I don't really want to eat massive slabs of meat and would prefer a smaller meat serving and more vegetables. DP always wants a huge bit of meat.

So they're maybe giving their customers what they want, but wording it very badly.